LTQ Orbitrap XL Hardware Manual

Functional Description
Gas Supply
In case argon is used as HCD collision gas, it should be of high purity
(99.99%).
The laboratory gas supply is connected to the inlets at the right side of
the instrument. See Figure 1-9 on page 1-11. Within the instrument,
the helium gas is led from the helium port through a stainless steel
capillary to the right rear side of the linear trap. Nitrogen gas and
HCD collision gas are both led via Teflon tubing to the right side of the
LTQ Orbitrap XL.
Part of the nitrogen gas flow is directed through Teflon tubing via a
pressure regulator to the vent valve of the linear trap. (See below for
further information.) Another part of the nitrogen flow is directed
through Teflon tubing to the vacuum chamber of the Orbitrap.
Nitrogen gas pressure to the C-Trap is kept constant by using an
“open-split” interface (gas flow divider, see Figure 1-21 on page 1-27). It
contains a capillary line from the nitrogen line of the instrument to
atmosphere (flow rate: ~20 mL/min), with another capillary leading
from the point of atmospheric pressure into the C-Trap (flow rate:
~0.2 mL/min). For the nitrogen gas to the C-Trap, black PEEKSil
tubing is used (75 μm ID silica capillary in 1/16 in PEEK tubing).
CLT RF Main board housing
Temperature controller board
Figure 1-20. Valve for HCD collision gas
1-26 LTQ Orbitrap XL Hardware Manual Thermo Fisher Scientific